ATF-55143 Typical Scattering Parameters, V = 3V, I = 20 mA
DS
DS
Freq.
S
GHz
Mag. 11 Ang.
S
dB
M2a1 g.
Ang.
0.1
0.998 -7.4
0.5
0.947 -35.9
0.9
0.859 -60.9
1.0
0.839 -66.7
1.5
0.738 -91.8
1.9
0.671 -108.7
2.0
0.657 -112.7
2.5
0.595 -131.7
3.0
0.552 -149.8
4.0
0.513 175.4
5.0
0.521 143.8
6.0
0.536 118.3
7.0
0.557 96.5
8.0
0.577 75.3
9.0
0.613 56.2
10.0
0.687 38
11.0
0.746 22
12.0
0.787 8.1
13.0
0.816 -7
14.0
0.842 -22.6
15.0
0.869 -37
16.0
0.863 -50.2
17.0
0.879 -59.6
18.0
0.924 -69.8
23.34
22.77
21.71
21.41
19.86
18.71
18.44
17.19
16.07
14.2
12.58
11.1
9.83
8.67
7.71
6.81
5.67
4.59
3.62
2.67
1.3
-0.29
-1.7
-2.87
14.697
13.762
12.178
11.764
9.844
8.621
8.354
7.233
6.36
5.13
4.256
3.588
3.1
2.715
2.43
2.192
1.922
1.697
1.516
1.36
1.161
0.967
0.822
0.719
174.2
151.9
132.9
128.7
110.5
98.5
95.7
82.7
70.9
49.1
28.7
9.7
-8.2
-25.8
-43.1
-61.8
-80.2
-97.2
-114.9
-133.6
-152.3
-169.6
175.6
159.7
S
Mag. 12
0.005
0.023
0.037
0.039
0.050
0.055
0.057
0.062
0.067
0.075
0.081
0.087
0.092
0.095
0.105
0.116
0.121
0.126
0.128
0.131
0.126
0.1200
0.118
0.113
Ang.
85.1
69.2
56.2
53.5
42.5
36.2
34.8
28.7
23.5
14.2
4.9
-3.5
-12.9
-22.1
-28.7
-41.7
-54
-66.1
-79.1
-93
-107.2
-120.2
-131.9
-145.9
S
Mag. 22
0.763
0.721
0.661
0.642
0.570
0.524
0.514
0.468
0.423
0.345
0.287
0.254
0.224
0.187
0.140
0.075
0.084
0.145
0.191
0.256
0.369
0.471
0.548
0.608
Ang.
-4.3
-20.6
-33.8
-36.3
-46.7
-52.5
-53.7
-59.1
-63.8
-74.3
-87.7
-101.6
-116.1
-124.3
-133.5
-178.8
94
54.4
30
8
-10.9
-23.5
-37.3
-52.2
MSG/MAG
dB
34.68
27.77
25.17
24.79
22.94
21.95
21.66
20.67
19.77
18.35
16.82
14.32
12.80
11.44
10.68
10.67
10.24
9.82
9.35
9.01
8.04
6.10
5.47
7.40
Typical Noise Parameters, V = 3V, I = 20 mA
DS
DS
Freq
Fmin
GHz
dB
Γopt
Γopt
Rn/50
Mag. Ang.
0.5
0.18
0.63
17.6
0.1
0.9
0.24
0.54
23.4
0.1
1.0
0.25
0.53
27.9
0.1
1.9
0.39
0.48
48.4
0.09
2.0
0.4
0.47
51.6
0.09
2.4
0.47
0.39
61.9
0.08
3.0
0.56
0.32
78.7
0.07
3.9
0.68
0.19
119.8 0.06
5.0
0.85
0.19
-170.4 0.06
5.8
0.97
0.22
-135.1 0.08
6.0
1.01
0.22
-128.4 0.09
7.0
1.14
0.28
-94.7 0.14
8.0
1.31
0.35
-66.8 0.25
9.0
1.47
0.44
-45.6 0.38
10.0
1.59
0.54
-28.9 0.57
Ga
dB
25.89
23.98
23.53
20
19.66
18.4
16.77
14.85
13.21
12.37
12.2
11.47
10.84
10.15
9.22
40
35
30
MSG
25
20
15 |S21|2
10
MAG
5
0
-5
0
5
10
15
20
FREQUENCY (GHz)
Figure 31. MSG/MAG and |S21|2 vs.
Frequency at 3V, 20 mA.
Notes:
1. F values at 2 GHz and higher are based on measurements while the F below 2 GHz have been extrapolated. The F values are based on
min
mins
min
a set of 16 noise figure measurements made at 16 different impedances using an ATN NP5 test system. From these measurements a true F is
min
calculated. Refer to the noise parameter application section for more information.
2. S and noise parameters are measured on a microstrip line made on 0.025 inch thick alumina carrier. The input reference plane is at the end of
the gate lead. The output reference plane is at the end of the drain lead. The parameters include the effect of four plated through via holes con-
necting source landing pads on top of the test carrier to the microstrip ground plane on the bottom side of the carrier. Two 0.020 inch diameter
via holes are placed within 0.010 inch from each source lead contact point, one via on each side of that point.
12